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Wednesday, February 22, 2012

Apple Scab: Biological Control

• Apple Scab: Apple scab, caused by the fungus
Venturia inaequalis, is the most important diseases of apples worldwide, and they very likely occur in every country where apples (Malus × domestica Borkh.) are grown. Without any control, the pathogens can cause extensive production losses in regions with humid, cool weather during the spring months. Biological pest control with epiphytic living antagonists (e.g., bacteria, yeast and other fungi) could help to avoid or to reduce the intensive application of pesticides and minimize their residues in the crop. P. fluorescens Bk3 leads to a induced resistance against infections by V. inaequalis or E. amylovora due to the fact that PR proteins are expressed before the infection with the pathogen. Such a pre-treatment of apple cultivars with non-pathogenic bacteria can eventually replace excessive treatment of apple

trees with pesticides.

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